package com.example.function_interface.function;

import com.example.function_interface.User;
import org.junit.Test;

import java.util.ArrayList;
import java.util.List;
import java.util.function.ToDoubleBiFunction;

/**
 * 接受两个输入参数，返回一个double类型结果
 */
public class ToDoubleBiFunctionTest {
    @Test
    public void myTest() throws Exception {
        List<User> userList = new ArrayList<>();
        User user1 = new User(1, "张三", 12, false, 23.8);
        User user2 = new User(2, "李四", 22, false, 200);
        User user3 = new User(3, "王五", 32, true, 123.2);
        User user4 = new User(4, "郑静", 2, true, 0);
        userList.add(user1);
        userList.add(user2);
        userList.add(user3);
        userList.add(user4);

        ToDoubleBiFunction<List<User>, Integer> toDoubleBiFunction = new ToDoubleBiFunction() {
            @Override
            public double applyAsDouble(Object o, Object o2) {
                List<User> userList = (List<User>) o;
                return userList.get((int)o2).getMoney();
            }
        };

        System.out.println(toDoubleBiFunction.applyAsDouble(userList, 2));
    }
}
